Add favicon and manifest file for improved website branding

Implement an API endpoint for dynamic favicon generation using SVG and add a manifest.json file for progressive web app capabilities.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 051a65da-1176-4478-a61c-c662f2a15536
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/051a65da-1176-4478-a61c-c662f2a15536/9NQBiz8

client/public/manifest.json

@@ -0,0 +1,23 @@
+{
+  "name": "go4.video - Professional Video Streaming Platform",
+  "short_name": "go4.video",
+  "description": "Professional video streaming platform featuring Geschichte des Liedes, FOLX STADL, and premium content",
+  "theme_color": "#6366f1",
+  "background_color": "#2D1B69",
+  "display": "standalone",
+  "start_url": "/",
+  "icons": [
+    {
+      "src": "/api/favicon?size=192",
+      "sizes": "192x192",
+      "type": "image/svg+xml",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/api/favicon?size=512",
+      "sizes": "512x512", 
+      "type": "image/svg+xml",
+      "purpose": "any maskable"
+    }
+  ]
+}